a, b, c, d ∈ R

and ad-bc=1

find the minimum of a^{2}+b^{2}+c^{2}+ac+bd

help me!! thanks :)

Printable View

- March 21st 2013, 09:43 AMli00512Help!! find the minimum
a, b, c, d ∈ R

and ad-bc=1

find the minimum of a^{2}+b^{2}+c^{2}+ac+bd

help me!! thanks :) - March 22nd 2013, 04:18 AMli00512Re: Help!! find the minimum
sorry, it should be "find the minimum of a2+b2+c2+d2+ac+bd"